<template>
    <div class="container">
        <div class="left-board">
            <div class="logo-wrapper">
                <div class="logo">自定义表单</div>
            </div>
            <el-scrollbar class="left-scrollbar">
                <div class="components-list">
                    <div class="components-title">
                        <svg-icon icon-class="component" />
                        输入型组件
                    </div>
                    <draggable
                        class="components-draggable"
                        :list="inputComponents"
                        :group="{
                            name: 'componentsGroup',
                            pull: 'clone',
                            put: false,
                        }"
                        :clone="cloneComponent"
                        draggable=".components-item"
                        :sort="false"
                        @end="onEnd"
                    >
                        <div
                            v-for="(element, index) in inputComponents"
                            :key="index"
                            class="components-item"
                            @click="addComponent(element)"
                        >
                            <div class="components-body">
                                <svg-icon :icon-class="element.tagIcon" />
                                {{ element.label }}
                            </div>
                        </div>
                    </draggable>
                    <div class="components-title">
                        <svg-icon icon-class="component" />
                        选择型组件
                    </div>
                    <draggable
                        class="components-draggable"
                        :list="selectComponents"
                        :group="{
                            name: 'componentsGroup',
                            pull: 'clone',
                            put: false,
                        }"
                        :clone="cloneComponent"
                        draggable=".components-item"
                        :sort="false"
                        @end="onEnd"
                    >
                        <div
                            v-for="(element, index) in selectComponents"
                            :key="index"
                            class="components-item"
                            @click="addComponent(element)"
                        >
                            <div class="components-body">
                                <svg-icon :icon-class="element.tagIcon" />
                                {{ element.label }}
                            </div>
                        </div>
                    </draggable>
                    <!--          <div class="components-title">-->
                    <!--            <svg-icon icon-class="component"/>-->
                    <!--            布局型组件-->
                    <!--          </div>-->
                    <!--          <draggable-->
                    <!--            class="components-draggable" :list="layoutComponents"-->
                    <!--            :group="{ name: 'componentsGroup', pull: 'clone', put: false }" :clone="cloneComponent"-->
                    <!--            draggable=".components-item" :sort="false" @end="onEnd"-->
                    <!--          >-->
                    <!--            <div-->
                    <!--              v-for="(element, index) in layoutComponents" :key="index" class="components-item"-->
                    <!--              @click="addComponent(element)"-->
                    <!--            >-->
                    <!--              <div class="components-body">-->
                    <!--                <svg-icon :icon-class="element.tagIcon"/>-->
                    <!--                {{ element.label }}-->
                    <!--              </div>-->
                    <!--            </div>-->
                    <!--          </draggable>-->
                </div>
            </el-scrollbar>
        </div>

        <div class="center-board">
            <div class="action-bar">
                <el-button size="small" type="danger" plain @click="empty"
                    >清空</el-button
                >
                <el-button size="small" type="info" plain @click="back"
                    >返回</el-button
                >
                <el-button size="small" type="primary" plain @click="commit"
                    >提交</el-button
                >
            </div>
            <el-scrollbar class="center-scrollbar">
                <el-row class="center-board-row" :gutter="formConf.gutter">
                    <el-form
                        :size="formConf.size"
                        :label-position="formConf.labelPosition"
                        :disabled="formConf.disabled"
                        :label-width="formConf.labelWidth + 'px'"
                    >
                        <draggable
                            class="drawing-board"
                            :list="drawingList"
                            :animation="340"
                            group="componentsGroup"
                        >
                            <draggable-item
                                v-for="(element, index) in drawingList"
                                :key="element.renderKey"
                                :drawing-list="drawingList"
                                :element="element"
                                :index="index"
                                :active-id="activeId"
                                :form-conf="formConf"
                                @activeItem="activeFormItem"
                                @copyItem="drawingItemCopy"
                                @deleteItem="drawingItemDelete"
                            />
                        </draggable>
                        <div v-show="!drawingList.length" class="empty-info">
                            从左侧拖入或点选组件进行表单设计
                        </div>
                    </el-form>
                </el-row>
            </el-scrollbar>
        </div>

        <right-panel
            :active-data="activeData"
            :form-conf="formConf"
            :show-field="!!drawingList.length"
            @tag-change="tagChange"
        />

        <code-type-dialog
            :visible.sync="dialogVisible"
            title="选择生成类型"
            :show-file-name="showFileName"
            @confirm="generate"
        />
        <input id="copyNode" type="hidden" />
    </div>
</template>

<script>
import draggable from "vuedraggable";
import beautifier from "js-beautify";
import ClipboardJS from "clipboard";
import render from "@/utils/generator/render";
import RightPanel from "./RightPanel";
import {
    inputComponents,
    selectComponents,
    layoutComponents,
    formConf,
} from "@/utils/generator/config";
import { beautifierConf, titleCase } from "@/utils/index";
import {
    makeUpHtml,
    vueTemplate,
    vueScript,
    cssStyle,
} from "@/utils/generator/html";
import { makeUpJs } from "@/utils/generator/js";
import { makeUpCss } from "@/utils/generator/css";
import drawingDefault from "@/utils/generator/drawingDefault";
import logo from "@/assets/logo/logo.png";
import CodeTypeDialog from "./CodeTypeDialog";
import DraggableItem from "./DraggableItem";

let oldActiveId;
let tempActiveData;

export default {
    components: {
        draggable,
        render,
        RightPanel,
        CodeTypeDialog,
        DraggableItem,
    },
    props: {
        jsonStr: {
            type: String,
            default: "",
        },
    },
    data() {
        return {
            logo,
            idGlobal: 100,
            formConf,
            inputComponents,
            selectComponents,
            layoutComponents,
            labelWidth: 100,
            drawingData: {},
            drawerVisible: false,
            formData: {},
            dialogVisible: false,
            generateConf: null,
            showFileName: false,
            drawingList: [],
            activeId: "",
            activeData: {},
            // jsonStr: null,
        };
    },
    created() {
        // 防止 firefox 下 拖拽 会新打卡一个选项卡
        document.body.ondrop = (event) => {
            event.preventDefault();
            event.stopPropagation();
        };
    },
    watch: {
        // eslint-disable-next-line func-names
        "activeData.label": function (val, oldVal) {
            if (
                this.activeData.placeholder === undefined ||
                !this.activeData.tag ||
                oldActiveId !== this.activeId
            ) {
                return;
            }
            this.activeData.placeholder =
                this.activeData.placeholder.replace(oldVal, "") + val;
        },
        activeId: {
            handler(val) {
                oldActiveId = val;
            },
            immediate: true,
        },
    },
    mounted() {
        this.$nextTick(() => {
            const customForm = JSON.parse(this.jsonStr);
            this.drawingList = customForm;
        });
        const clipboard = new ClipboardJS("#copyNode", {
            text: (trigger) => {
                const codeStr = this.generateCode();
                this.$notify({
                    title: "成功",
                    message: "代码已复制到剪切板，可粘贴。",
                    type: "success",
                });
                return codeStr;
            },
        });
        clipboard.on("error", (e) => {
            this.$message.error("代码复制失败");
        });
    },
    methods: {
        // 提交
        commit() {
            let json = JSON.stringify(this.drawingList);
            console.log(this.drawingList);
            this.$emit("getJsonInfo", json);
        },
        //返回
        back() {
            this.$router.back();
        },
        //获取json
        // getJson() {
        //     let json = JSON.stringify(this.drawingList);
        //     this.jsonStr = json;
        // },
        activeFormItem(element) {
            this.activeData = element;
            this.activeId = element.formId;
        },
        onEnd(obj, a) {
            if (obj.from !== obj.to) {
                this.activeData = tempActiveData;
                this.activeId = this.idGlobal;
            }
        },
        addComponent(item) {
            const clone = this.cloneComponent(item);
            this.drawingList.push(clone);
            this.activeFormItem(clone);
        },
        cloneComponent(origin) {
            const clone = JSON.parse(JSON.stringify(origin));
            clone.formId = ++this.idGlobal;
            clone.span = formConf.span;
            clone.renderKey = +new Date(); // 改变renderKey后可以实现强制更新组件
            if (!clone.layout) clone.layout = "colFormItem";
            if (clone.layout === "colFormItem") {
                clone.vModel = `field${this.idGlobal}`;
                clone.placeholder !== undefined &&
                    (clone.placeholder += clone.label);
                tempActiveData = clone;
            } else if (clone.layout === "rowFormItem") {
                delete clone.label;
                clone.componentName = `row${this.idGlobal}`;
                clone.gutter = this.formConf.gutter;
                tempActiveData = clone;
            }
            return tempActiveData;
        },
        AssembleFormData() {
            this.formData = {
                fields: JSON.parse(JSON.stringify(this.drawingList)),
                ...this.formConf,
            };
        },
        generate(data) {
            const func = this[`exec${titleCase(this.operationType)}`];
            this.generateConf = data;
            func && func(data);
        },
        execRun(data) {
            this.AssembleFormData();
            this.drawerVisible = true;
        },
        execDownload(data) {
            const codeStr = this.generateCode();
            const blob = new Blob([codeStr], {
                type: "text/plain;charset=utf-8",
            });
            this.$download.saveAs(blob, data.fileName);
        },
        execCopy(data) {
            document.getElementById("copyNode").click();
        },
        empty() {
            this.$confirm("确定要清空所有组件吗？", "提示", {
                type: "warning",
            }).then(() => {
                this.drawingList = [];
            });
        },
        drawingItemCopy(item, parent) {
            let clone = JSON.parse(JSON.stringify(item));
            clone = this.createIdAndKey(clone);
            parent.push(clone);
            this.activeFormItem(clone);
        },
        createIdAndKey(item) {
            item.formId = ++this.idGlobal;
            item.renderKey = +new Date();
            if (item.layout === "colFormItem") {
                item.vModel = `field${this.idGlobal}`;
            } else if (item.layout === "rowFormItem") {
                item.componentName = `row${this.idGlobal}`;
            }
            if (Array.isArray(item.children)) {
                item.children = item.children.map((childItem) =>
                    this.createIdAndKey(childItem)
                );
            }
            return item;
        },
        drawingItemDelete(index, parent) {
            parent.splice(index, 1);
            this.$nextTick(() => {
                const len = this.drawingList.length;
                if (len) {
                    this.activeFormItem(this.drawingList[len - 1]);
                }
            });
        },
        generateCode() {
            const { type } = this.generateConf;
            this.AssembleFormData();
            const script = vueScript(makeUpJs(this.formData, type));
            const html = vueTemplate(makeUpHtml(this.formData, type));
            const css = cssStyle(makeUpCss(this.formData));
            return beautifier.html(html + script + css, beautifierConf.html);
        },
        download() {
            this.dialogVisible = true;
            this.showFileName = true;
            this.operationType = "download";
        },
        run() {
            this.dialogVisible = true;
            this.showFileName = false;
            this.operationType = "run";
        },
        copy() {
            this.dialogVisible = true;
            this.showFileName = false;
            this.operationType = "copy";
        },
        tagChange(newTag) {
            newTag = this.cloneComponent(newTag);
            newTag.vModel = this.activeData.vModel;
            newTag.formId = this.activeId;
            newTag.span = this.activeData.span;
            delete this.activeData.tag;
            delete this.activeData.tagIcon;
            delete this.activeData.document;
            Object.keys(newTag).forEach((key) => {
                if (
                    this.activeData[key] !== undefined &&
                    typeof this.activeData[key] === typeof newTag[key]
                ) {
                    newTag[key] = this.activeData[key];
                }
            });
            this.activeData = newTag;
            this.updateDrawingList(newTag, this.drawingList);
        },
        updateDrawingList(newTag, list) {
            const index = list.findIndex(
                (item) => item.formId === this.activeId
            );
            if (index > -1) {
                list.splice(index, 1, newTag);
            } else {
                list.forEach((item) => {
                    if (Array.isArray(item.children))
                        this.updateDrawingList(newTag, item.children);
                });
            }
        },
    },
};
</script>

<style lang="scss" scoped>
.editor-tabs {
    background: #121315;

    .el-tabs__header {
        margin: 0;
        border-bottom-color: #121315;

        .el-tabs__nav {
            border-color: #121315;
        }
    }

    .el-tabs__item {
        height: 32px;
        line-height: 32px;
        color: #888a8e;
        border-left: 1px solid #121315 !important;
        background: #363636;
        margin-right: 5px;
        user-select: none;
    }

    .el-tabs__item.is-active {
        background: #1e1e1e;
        border-bottom-color: #1e1e1e !important;
        color: #fff;
    }

    .el-icon-edit {
        color: #f1fa8c;
    }

    .el-icon-document {
        color: #a95812;
    }
}

// home
.right-scrollbar {
    .el-scrollbar__view {
        padding: 12px 18px 15px 15px;
    }
}

.left-scrollbar .el-scrollbar__wrap {
    box-sizing: border-box;
    overflow-x: hidden !important;
    margin-bottom: 0 !important;
}

.center-tabs {
    .el-tabs__header {
        margin-bottom: 0 !important;
    }

    .el-tabs__item {
        width: 50%;
        text-align: center;
    }

    .el-tabs__nav {
        width: 100%;
    }
}

.reg-item {
    padding: 12px 6px;
    background: #f8f8f8;
    position: relative;
    border-radius: 4px;

    .close-btn {
        position: absolute;
        right: -6px;
        top: -6px;
        display: block;
        width: 16px;
        height: 16px;
        line-height: 16px;
        background: rgba(0, 0, 0, 0.2);
        border-radius: 50%;
        color: #fff;
        text-align: center;
        z-index: 1;
        cursor: pointer;
        font-size: 12px;

        &:hover {
            background: rgba(210, 23, 23, 0.5);
        }
    }

    & + .reg-item {
        margin-top: 18px;
    }
}

.action-bar {
    & .el-button + .el-button {
        margin-left: 15px;
    }

    & i {
        font-size: 20px;
        vertical-align: middle;
        position: relative;
        top: -1px;
    }
}

.custom-tree-node {
    width: 100%;
    font-size: 14px;

    .node-operation {
        float: right;
    }

    i[class*="el-icon"] + i[class*="el-icon"] {
        margin-left: 6px;
    }

    .el-icon-plus {
        color: #409eff;
    }

    .el-icon-delete {
        color: #157a0c;
    }
}

.left-scrollbar .el-scrollbar__view {
    overflow-x: hidden;
}

.el-rate {
    display: inline-block;
    vertical-align: text-top;
}

.el-upload__tip {
    line-height: 1.2;
}

$selectedColor: #f6f7ff;
$lighterBlue: #409eff;

.container {
    position: relative;
    width: 100%;
    height: 100%;
}

.components-list {
    padding: 8px;
    box-sizing: border-box;
    height: 100%;

    .components-item {
        display: inline-block;
        width: 48%;
        margin: 1%;
        transition: transform 0ms !important;
    }
}

.components-draggable {
    padding-bottom: 20px;
}

.components-title {
    font-size: 14px;
    color: #222;
    margin: 6px 2px;

    .svg-icon {
        color: #666;
        font-size: 18px;
    }
}

.components-body {
    padding: 8px 10px;
    background: $selectedColor;
    font-size: 12px;
    cursor: move;
    border: 1px dashed $selectedColor;
    border-radius: 3px;

    .svg-icon {
        color: #777;
        font-size: 15px;
    }

    &:hover {
        border: 1px dashed #787be8;
        color: #787be8;

        .svg-icon {
            color: #787be8;
        }
    }
}

.left-board {
    width: 260px;
    position: absolute;
    left: 0;
    top: 0;
    height: 100vh;
}

.left-scrollbar {
    height: calc(100vh - 42px);
    overflow: hidden;
}

.center-scrollbar {
    height: calc(100vh - 42px);
    overflow: hidden;
    border-left: 1px solid #f1e8e8;
    border-right: 1px solid #f1e8e8;
    box-sizing: border-box;
}

.center-board {
    height: 100vh;
    width: auto;
    margin: 0 350px 0 260px;
    box-sizing: border-box;
}

.empty-info {
    position: absolute;
    top: 46%;
    left: 0;
    right: 0;
    text-align: center;
    font-size: 18px;
    color: #ccb1ea;
    letter-spacing: 4px;
}

.action-bar {
    position: relative;
    height: 42px;
    text-align: right;
    padding: 0 15px;
    box-sizing: border-box;
    border: 1px solid #f1e8e8;
    border-top: none;
    border-left: none;

    .delete-btn {
        color: #f56c6c;
    }
}

.logo-wrapper {
    position: relative;
    height: 42px;
    background: #fff;
    border-bottom: 1px solid #f1e8e8;
    box-sizing: border-box;
}

.logo {
    position: absolute;
    left: 12px;
    top: 6px;
    line-height: 30px;
    color: #00afff;
    font-weight: 600;
    font-size: 17px;
    white-space: nowrap;

    > img {
        width: 30px;
        height: 30px;
        vertical-align: top;
    }

    .github {
        display: inline-block;
        vertical-align: sub;
        margin-left: 15px;

        > img {
            height: 22px;
        }
    }
}

.center-board-row {
    padding: 12px 12px 15px 12px;
    box-sizing: border-box;

    & > .el-form {
        // 69 = 12+15+42
        height: calc(100vh - 69px);
    }
}

.drawing-board {
    height: 100%;
    position: relative;

    .components-body {
        padding: 0;
        margin: 0;
        font-size: 0;
    }

    .sortable-ghost {
        position: relative;
        display: block;
        overflow: hidden;

        &::before {
            content: " ";
            position: absolute;
            left: 0;
            right: 0;
            top: 0;
            height: 3px;
            background: rgb(89, 89, 223);
            z-index: 2;
        }
    }

    .components-item.sortable-ghost {
        width: 100%;
        height: 60px;
        background-color: $selectedColor;
    }

    .active-from-item {
        & > .el-form-item {
            background: $selectedColor;
            border-radius: 6px;
        }

        & > .drawing-item-copy,
        & > .drawing-item-delete {
            display: initial;
        }

        & > .component-name {
            color: $lighterBlue;
        }
    }

    .el-form-item {
        margin-bottom: 15px;
    }
}

.drawing-item {
    position: relative;
    cursor: move;

    &.unfocus-bordered:not(.activeFromItem) > div:first-child {
        border: 1px dashed #ccc;
    }

    .el-form-item {
        padding: 12px 10px;
    }
}

.drawing-row-item {
    position: relative;
    cursor: move;
    box-sizing: border-box;
    border: 1px dashed #ccc;
    border-radius: 3px;
    padding: 0 2px;
    margin-bottom: 15px;

    .drawing-row-item {
        margin-bottom: 2px;
    }

    .el-col {
        margin-top: 22px;
    }

    .el-form-item {
        margin-bottom: 0;
    }

    .drag-wrapper {
        min-height: 80px;
    }

    &.active-from-item {
        border: 1px dashed $lighterBlue;
    }

    .component-name {
        position: absolute;
        top: 0;
        left: 0;
        font-size: 12px;
        color: #bbb;
        display: inline-block;
        padding: 0 6px;
    }
}

.drawing-item,
.drawing-row-item {
    &:hover {
        & > .el-form-item {
            background: $selectedColor;
            border-radius: 6px;
        }

        & > .drawing-item-copy,
        & > .drawing-item-delete {
            display: initial;
        }
    }

    & > .drawing-item-copy,
    & > .drawing-item-delete {
        display: none;
        position: absolute;
        top: -10px;
        width: 22px;
        height: 22px;
        line-height: 22px;
        text-align: center;
        border-radius: 50%;
        font-size: 12px;
        border: 1px solid;
        cursor: pointer;
        z-index: 1;
    }

    & > .drawing-item-copy {
        right: 56px;
        border-color: $lighterBlue;
        color: $lighterBlue;
        background: #fff;

        &:hover {
            background: $lighterBlue;
            color: #fff;
        }
    }

    & > .drawing-item-delete {
        right: 24px;
        border-color: #f56c6c;
        color: #f56c6c;
        background: #fff;

        &:hover {
            background: #f56c6c;
            color: #fff;
        }
    }
}
</style>
